1252315136 has 26 divisors (see below), whose sum is σ = 2504332722. Its totient is φ = 626155520.

The previous prime is 1252315093. The next prime is 1252315147. The reversal of 1252315136 is 6315132521.

It can be written as a sum of positive squares in only one way, i.e., 688537600 + 563777536 = 26240^2 + 23744^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1252315099 and 1252315108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148775 + ... + 156966.

Almost surely, 2^1252315136 is an apocalyptic number.

1252315136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1252315136 is a deficient number, since it is larger than the sum of its proper divisors (1252017586).

1252315136 is an frugal number, since it uses more digits than its factorization.

1252315136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305765 (or 305743 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 1252315136 is about 35388.0648806911. The cubic root of 1252315136 is about 1077.8819761030.

Adding to 1252315136 its reverse (6315132521), we get a palindrome (7567447657).

The spelling of 1252315136 in words is "one billion, two hundred fifty-two million, three hundred fifteen thousand, one hundred thirty-six".